CustomNPC-Plus/src/main/java/noppes/npcs/ai/EntityAIMoveIndoors.java

package noppes.npcs.ai;

import net.minecraft.entity.EntityCreature;
import net.minecraft.entity.ai.EntityAIBase;
import net.minecraft.util.MathHelper;
import net.minecraft.util.Vec3;
import net.minecraft.world.World;
import noppes.npcs.constants.AiMutex;

import java.util.Random;

public class EntityAIMoveIndoors extends EntityAIBase {
    private EntityCreature theCreature;
    private double shelterX;
    private double shelterY;
    private double shelterZ;
    private World theWorld;

    public EntityAIMoveIndoors(EntityCreature par1EntityCreature) {
        this.theCreature = par1EntityCreature;
        this.theWorld = par1EntityCreature.worldObj;
        this.setMutexBits(AiMutex.PASSIVE);
    }

    /**
     * Returns whether the EntityAIBase should begin execution.
     */
    public boolean shouldExecute() {

        int x = MathHelper.floor_double(this.theCreature.posX);
        int y = (int) this.theCreature.boundingBox.minY;
        int z = MathHelper.floor_double(this.theCreature.posZ);
        if ((!this.theCreature.worldObj.isDaytime() || this.theCreature.worldObj.isRaining()) && !this.theCreature.worldObj.provider.hasNoSky) {
            if (!this.theWorld.canBlockSeeTheSky(x, y, z) && this.theWorld.getFullBlockLightValue(x, y, z) > 8) {
                return false;
            } else {
                Vec3 var1 = this.findPossibleShelter();

                if (var1 == null) {
                    return false;
                } else {
                    this.shelterX = var1.xCoord;
                    this.shelterY = var1.yCoord;
                    this.shelterZ = var1.zCoord;
                    return true;
                }
            }
        } else {
            return false;
        }
    }

    /**
     * Returns whether an in-progress EntityAIBase should continue executing
     */
    public boolean continueExecuting() {
        return !this.theCreature.getNavigator().noPath();
    }

    /**
     * Execute a one shot task or start executing a continuous task
     */
    public void startExecuting() {
        this.theCreature.getNavigator().tryMoveToXYZ(this.shelterX, this.shelterY, this.shelterZ, 1.0D);
    }

    private Vec3 findPossibleShelter() {
        Random var1 = this.theCreature.getRNG();

        for (int var2 = 0; var2 < 10; ++var2) {
            int var3 = MathHelper.floor_double(this.theCreature.posX + (double) var1.nextInt(20) - 10.0D);
            int var4 = MathHelper.floor_double(this.theCreature.boundingBox.minY + (double) var1.nextInt(6) - 3.0D);
            int var5 = MathHelper.floor_double(this.theCreature.posZ + (double) var1.nextInt(20) - 10.0D);

            if (!this.theWorld.canBlockSeeTheSky(var3, var4, var5) && this.theWorld.getFullBlockLightValue(var3, var4, var5) > 8) {
                return Vec3.createVectorHelper((double) var3, (double) var4, (double) var5);
            }
        }

        return null;
    }
}